A little D.C. parlor game at the moment is guessing who the author of the Anonymous novel O: A Presidential Novel, is. The New York Post’s Page Six pointed to former longtime John McCain adviser Mark Salter. Mark Halperin today says he has it “Confirmed by sources” that Salter is Mr. Anonymous. This morning, for what it’s worth, this is what Salter had to say to me: “I can’t confirm I’m the author. Been asked by the publisher, as have many others, not to comment on it.”

All I really know is if Salter wrote it, it’s a good read.

UPDATE: I should make clear: I haven’t read O yet. Assessment is a gamble, being familiar with Salter’s past writing.